Automatic speed-controlled device



Feb. 16 1926. I 1,573,621

' v Q. ALSTAD AUTOMATIC SPEED CONTROLLED DEVI-CE Filed April 15 1925 2 Sheets-Sheet 2 I @/MM Patented Feb. 16, 1926.

[ UNITED STATES 1,573,621 PATENT OFFICE.

oscAn'ALsTAn, or EvAnsvrr Ln, MINNESOTA.

AUTOMATIC SPEED-CONTROLLED DEVICE.

Application filed April 1 5, 1925. Serial No. 23,321.

- retor.

The device has more specific reference to an attachment which can be supplied to a conventional type of motor, such as that used upon Ford automobiles, and one feature of I theinventlon ls'that 1t 1s operated from the fan shaft, an element which is inturn operated from the engine shaft. 1

r The primary ob ect is to generally improve upon devices of this class, by provid' ing one of comparatively simple and 'dura ble nature, capable of being applied without requiring extensive alterations, and one that maybe safely relied upon to positively opcrate according to the. speed of rotation of the engine shaft. H

Other features and advantages of the invention will become apparent during the course of the following description and drawings.

In the accompanying drawings,'forming a part of this application, and in which like numerals are employed to designate like parts throughout the same:

Figure 1 is a top plan view of a part of a Ford motor, showing the improved device, in position thereon.

Figure 2 is a side elevation of the device detached. I Figure 3 is an enlarged detail perspective view of the rear end portion, showing the construction and arrangement ofdetails more plainly. 1

Figure 4: is a longitudinal section through the governor slide. v I

Figure 5 is a detail perspective View of one of the governor arms,

Referring to the drawings in detail, the reference character 1' designates a shaft, which is connected at its forward end by a bracket ar1n2, and at its rearend by a relatively long bracket arm 8. These arms diverge toward each other, and are bolted, as at 4, to the motor.

Slidable upon this shaft isthe centrifugal.

speed governor 5 set into rotation by a pulley 6, this pulley being driven by a belt 7 trained over an additional pulley 8 on the.

fan shaft 9. In this connection, it will be observed that the governor is rendered very sensitiveby employing two-ply arms 10. as shown in Figure 5, the outer ends of the arms of course being equipped with the usual weights. Fastened to the rear end of the shaft 1 (see Figs. 2 and 3) is a standard 11 having its upper edge twisted as at 12. Mounted upon this twisted end is an arm .15 having a downturned forward end carrying an adjustingscrew 14E.

approximate angle indicated at 15 and'carries a flat spring 16. Interposed between the standard 11 and'the centrifugal governor 5 is what may be generally termed a slide 17 and as shown in Figure 1, this slide comprises an outer sleeve 18, an inner sleeve'19, and an intervening sleeve. 20. The outer sleeve 18 is provided with a flange with which the governor is connected. The inner sleeve 19 is also provided with a flange 21, with which a yoke 22 is connected. -Also connected to this flange is a rod 23, extending rearwardlythrough a hole in the standard 11 and bearing at'its free end-against the flat spring 16. Rigidly secured at its forward end to the shaft 1 is a rearwardly extending supporting member 24, upon which abell crank 25 is pivoted, this bell crank being operated by connection 26 between the short arm thereof and the aforesaid yoke 22. An operatingrod 27 is connected to the longerarm of the bell crank .at one end and is connected at its opposite The opposite rear end is also downturned and disposed at the.

end to the control means 28 for a throttle valve in the carburetor 29.

In operation, it will be seen that the cen trifugal governor 25 will be rotated about the shaft 1, through the medium of the pulleys 6 and 8 and the belt 7 WVhen the speed of rotation of the governor becomes exces- I sive, the resilient arms 10 fly out to exert an endwise thrust upon the slide 17. The slide ner, the speed of the engine is cut down. I

During the aforesaid operation, the flat spring 16' maintains a constant yielding pressure against the slide 17 through the rod 23, thus resisting the rearward sliding of the sleeve 17, serving to automatically return the parts to their normal positions as the speed of the vehicle is reduced.

It is thought that persons familiar with speed controlling devices of this class will, upon carefully considering the description in connection with the drawings, be able to obtain a clear understanding of the present invention. 'lherefore a more lengthy description need not be entered.

While the preferred embodiment of the invention has been shown and described, itis to be understood that minor changes coming within'the field of invention claimed may be resorted to, if desired I claim:

1. In speed control device of the class described, a relatively stationary shaft, means for supporting said shaft from a mo tor block, a centrifugal governor slidable and rotatable upon said shaft and embodying a rotating pulley, a slide mounted upon said shaft, a bell crank supported from said shaft, a connection between said bell crank and said slide whereby the bell crank is vung upon its pivot according to the movement of the slide, and adjustable spring means supported upon said shaft and cooperable with said slide to resist said sliding movement in a rearward direction.

2. In a speed control device of the kind specified, a relatively stationary shaft, bracket arms connected to the opposite ends of said shaft and adapted to be connected to an engine motor for supporting said shaft, a

slide longitudinally movable upon said shaft, a centrifugal governor for operating said slide, a standard connected with the rear end of said shaft, an arm pivotally mounted upon said standard, an adjusting screw carried by said arm and bearing against said standard, a flat spring connected to said arm and depending therefrom, and a rod carried by said slide and bearing against said spring.

3. In a speed control device of the class described, a relatively stationary shaft, supporting means therefor, a centrifugal governor mounted for rotation and sliding upon said shaft, a slide upon said shaft, said slide being made up of independent sections, a yoke connected with one of said sections, a bell crank, means for supporting said bell crank from said shaft, a connection between said bell crank and said yoke, and spring means supported from said shaft and cooperable with said slide for resisting the sliding movement in one direction.

4t. In a speed control device of the class described, a shaft, supporting bracket arms for said shaft, a centrifugal governor rotatable and slidable upon said shaft including a rotating pulley, a sectional slide mounted on said shaft, a standard carried by said shaft, an arm pivoted upon said standard, adjusting means for said arm, a spring carried by said arm, means interposed between said spring and slide to resist the sliding movement of the slide in one direction, a bell crank, means for supporting the bell crank from said shaft, and a connection between said bell crank and said slide.

In testimony whereof I aflix my signature,

OSCAR ALSTAD. 

